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            <div class="col-md-6 mb-3 mb-md-0">
              <h5 class="h3 font-weight-400 mb-0 text-white">Students</h5>
              <span class="text-sm text-white opacity-8">一共有 <b class="total">0</b> 位学员</span>
            </div>
            <div class="col-md-6 d-flex align-items-center justify-content-between justify-content-md-end">
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            <div class="card card-fluid">
              <div class="table-responsive" style="min-height: 1000px">
                <table class="table align-items-center">
                  <thead>
                    <tr>
                      <th>姓名</th>
                      <th>年龄</th>
                      <th>性别</th>
                      <th>组号</th>
                      <th>期望薪资</th>
                      <th>就业薪资</th>
                      <th>籍贯</th>
                      <th>操作</th>
                    </tr>
                  </thead>
                  <tbody class="list">
                    <!-- <tr>
                      <td>张杰</td>
                      <td>20</td>
                      <td>男</td>
                      <td>第2组</td>
                      <td>10000</td>
                      <td>13000</td>
                      <td>北京北京市东城区</td>
                      <td>
                        <a href="javascript:;" class="text-success mr-3"><i class="bi bi-pen"></i></a>
                        <a href="javascript:;" class="text-danger"><i class="bi bi-trash"></i></a>
                      </td>
                    </tr> -->
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  </div>
  <!-- add Modal -->
  <div class="modal fade" id="modal">
    <div class="modal-dialog modal-lg">
      <div class="modal-content">
        <div class="modal-header">
          <h5 class="modal-title">添加/编辑学员</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
        </div>
        <div class="modal-body">
          <form id="form" class="g-3 row" autocomplete="off" novalidate>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">姓名：</label>
                <input type="text" name="name" class="form-control" placeholder="请输入姓名" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">性别：</label>
                <div class="input">
                  <div class="form-check d-inline-block">
                    <input value="0" checked id="cb01" class="form-check-input" type="radio" name="gender" />
                    <label for="cb01" class="form-check-label">男</label>
                  </div>
                  <div class="form-check d-inline-block">
                    <input value="1" id="cb02" class="form-check-input" type="radio" name="gender" />
                    <label for="cb02" class="form-check-label">女</label>
                  </div>
                </div>
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">年龄：</label>
                <input type="text" name="age" class="form-control" placeholder="请输入年龄" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">组号：</label>
                <input type="text" name="group" class="form-control" placeholder="请输入1-8组号" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">期望薪资：</label>
                <input type="text" name="hope_salary" class="form-control" placeholder="请输入期望薪资" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">就业薪资：</label>
                <input type="text" name="salary" class="form-control" placeholder="请输入就业薪资" />
              </div>
            </div>
            <div class="col-sm-12">
              <div class="form-group">
                <label class="input-group-label">籍贯：</label>
                <div class="input pl-0">
                  <select class="form-select custom-select" name="province">
                    <option value="">--省份--</option>
                  </select>
                  <select class="form-select custom-select" name="city">
                    <option value="">--城市--</option>
                  </select>
                  <select class="form-select custom-select" name="area">
                    <option value="">--地区--</option>
                  </select>
                </div>
              </div>
            </div>
          </form>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
          <button type="button" class="btn btn-blue" id="submit">确认</button>
        </div>
      </div>
    </div>
  </div>



  <script src="./bootstrap/bootstrap.min.js"></script>
  <script src="./lib/axios.js"></script>
  <script src="./lib/form-serialize.js"></script>
  <script src="./js/common.js"></script>
    <script>
      // 页面一打开，就判断是否有token（决定是否有权限访问此页面）
      // if (!localStorage.getItem('user-token')) {
      //   location.href = './login.html'
      // }
      renderList()
        //渲染函数
      async function renderList(){
        const {data} = await axios.get('/students')
        //获取学生数据
        const htmlStr = data.map(item => {
          return `
              <tr>
                <td>${item.name}</td>
                <td>${item.age}</td>
                <td>${item.gender === 0?'男':'女'}</td>
                <td>第${item.group}组</td>
                <td>${item.hope_salary}</td>
                <td>${item.salary}</td>
                <td>${item.province}${item.city}${item.area}北京市东城区</td>
                <td>
                  <a href="javascript:;" class="text-success mr-3"><i class="bi bi-pen" data-id="${item.id}"></i></a>
                  <a href="javascript:;" class="text-danger"><i class="bi bi-trash" data-id="${item.id}"></i></a>
                </td>
              </tr>
          `
        }).join('')
        document.querySelector('tbody').innerHTML = htmlStr
      }
  
      //删除学生
      //2.1 绑定单机事件（事件委托）
      const tbody = document.querySelector('tbody')
      tbody.addEventListener('click', async function(e){
        //2.2 判定是否是删除按钮
        if(e.target.classList.contains('bi-trash')){
          //2.3获取学生的id
          const id = e.target.dataset.id
          // console.log(id)
          try{
            //2.4 调接口，发请求
            await axios.delete(`/students/${id}`)
             //2.5 重新渲染数据
            renderList()
          }catch{
            alert('删除失败，请稍后再试')
          }
        }
      })
      

      //添加学生 
      //模态框使用
      const  modalBox = document.querySelector('#modal')
      const modal = new bootstrap.Modal(modalBox)
      // modal.show()
      const btnInner = document.querySelector('#openModal')
      // console.log(btnInner)
      btnInner.addEventListener('click',function(){
        modal.show()
        //清楚表单内容
        modalBox.querySelector('form').reset()
        modalBox.querySelector('.modal-title').innerHTML = '添加学院'
        //提前规划： 添加和编辑公用一个表单，为了区分，给模态框盒子设置一个自定义属性
        modalBox.dataset.id = 'add'
      })


      //编辑学院信息
      document.querySelector('tbody').addEventListener('click',async function(e){
        if(e.target.classList.contains('bi-pen')){
          //获取id
          const id = e.target.dataset.id
          // console.log(id)
          //标识模态框 上id
          modalBox.dataset.id = id

          modalBox.querySelector('.modal-title').innerHTML = '编辑学员'

          //调接口
          const {data:studentInfo} = await axios.get(`/students/${id}`)
          //将伪数组变成真数组
          const formArr = [...modalBox.querySelectorAll('form [name]')]
          console.log(studentInfo)
          formArr.forEach(item => {
            if(item.name === 'gender'){
              //判断 studentInfo.gender 的值 是0则保持默认，为1 则选中女
              if(studentInfo.gender === 1){
                item.checked = true
              }
            }else{
              item.value = studentInfo[item.name]
            }
          })
          //处理市和区的回显
          //城市回显处理
          const {data:cArr} = await axios({
          method:'get',
          url:'/api/city',
          params:{
            pname:studentInfo.province
          }
          })
          const cStr = cArr.map(item => {
            return `
              <option value="${item}">${item}</option>
            `
          }).join('')
          cSelect.innerHTML = '<option value="">--城市--</option>' + cStr
          cSelect.value = studentInfo.city
          //地区回显处理
          const {data:aArr} = await axios({
          method:'get',
          url:'/api/area',
          params:{
            pname:studentInfo.province,
            cname:cSelect.value
          }
          })
          const aStr = aArr.map(item => {
            return `
              <option value="${item}">${item}</option>
            `
          }).join('')
          aSelect.innerHTML = '<option value="">--地区--</option>' + aStr
          aSelect.value = studentInfo.area
          modal.show()
        }  
      })

      //注册单击事件
      modalBox.querySelector('#submit').addEventListener('click',async function(e){
          const form = document.querySelector('form')
          const data = serialize(form,{hash:true})

          data.age = +data.age
          data.gender = +data.gender
          data.hope_salary = +data.hope_salary
          data.salary = +data.salary
          data.group = +data.group
          // console.log(data)
          //调接口
          if(modalBox.dataset.id === 'add'){
            try{
            await axios.post('/students',data)
            modal.hide()
            renderList()
          }catch{
            alert('添加失败，请稍后再添加')
          }
          }else{
            try{
              const res = await axios.put(`/students/${modalBox.dataset.id}`,data)
              renderList()
              modal.hide()
            }catch{
              alert('修改失败，稍后再试')
            }
          }
        })
      

      //3.2 省市区联动
      //3.2.1  获取三个下拉列表
      const pSelect = document.querySelector('[name="province"]')
      const cSelect = document.querySelector('[name="city"]')
      const aSelect = document.querySelector('[name="area"]')
      //3.2.2 获取省份数据，渲染到下拉列表
      async function initProvice(){
        const {data:pArr} =  await axios.get('/api/province')
        // console.log(pArr)
        const str = pArr.map(item => {
          return `
              <option value="${item}">${item}</option>
          `
        }).join('')
        pSelect.innerHTML = '<option value="">--省份--</option>' + str
        
      }
      initProvice()
      //3.2.3 监听省份的变化，城市跟着变，监听城市变化，区县跟着变

      pSelect.addEventListener('change',async function(){
        const {data:cArr} = await axios({
          method:'get',
          url:'/api/city',
          params:{
            pname:pSelect.value
          }
        })
        const str = cArr.map(item => {
          return `
            <option value="${item}">${item}</option>
          `
        }).join('')

        cSelect.innerHTML = '<option value="">--城市--</option>' + str
        aSelect.innerHTML = '<option value="">--地区--</option>'
      })
      cSelect.addEventListener('change',async function(){
        const {data:aArr} = await axios({
          method:'get',
          url:'/api/area',
          params:{
            pname:pSelect.value,
            cname:cSelect.value
          }
        })
        const str = aArr.map(item => {
          return `
            <option value="${item}">${item}</option>
          `
        }).join('')
        

        aSelect.innerHTML = '<option value="">--地区--</option>' + str
      })


      
      
      
     
    </script>
</body>

</html>